Structural corner member



Dec. 15, 1931.

B. E. CROVV/LL STRUCTIONAL CORNE/IR MEMBER Filed May 4, 1929 llllll L L I I I PU Patented Dec. 15, 1931' UNITED STATES BENJAMIN E. CROWELL, OIEMEIDIA, PENNSYLVANIA STRUCTURAL CORNER MEMBER Application filed May 4,

My invention relates to a corner structure for walls with more particular reference to a wall structure that uses wall boards such H p as plasterboard to be covered with a final coat of plaster or the like.

A purpose of my invention is to combine an outside corner bead with an outside corner furring strip.

A further purpose is to adapt a structural i member that is to function as a corner bead and as a furring support for the corner ends of wall boards for easy fastening to different kinds of walls.

'A further purpose is to bend and cut a metal sheet into a combined structural corner bead and corner furring strip.

A further purpose is to provide an outside corner bead'with side portions adapted to seat the adjacent ends of wall boards and i adapted to be readily bent to fasten to structural corners inside the wall board.

Further purposes will appear in the specification and in the claims.

I have elected to show one only of the many 2 difl'erentforms of my invention showing however a detail variation of fastening to differentkinds of corner structures and have selected a form that is practical and efiicient in operation and which well illustrates the principles involved.

Figure 1 is a horizontal section through corner wall structure embodying one form of my invention.

Figure 2 is a horizontal sectional view 3 generally similar to Figure 1 but showing my structural'corner furring strip and corner bead member fastened to a different kind of corner structure from that shown in F1gure 1. Y

Figures 3 and 4 are respectively front and 1929. Serial No. 360,409.

a cornerbead to give a corner stop for a final coat of plaster, and a corner furring strip for supporting the corner ends of wall board.

The wall-board. is usually plasterboard and normally receives an outer coat of plaster l5? which stops against the bead at the corner.

My structural member'combines the functions of a'corner bead and of corner furring strips for supporting the corner ends of wall 7 boards at any desired definite distances outto wardly from inner wall structure.

Preferably the member is made of a single piece of sheet metal by suitably cutting and bending the piece, and while actually the cutting and bending operations should be performed by machinery suited to quantity production of the duplicate standard members, the formation of an individual member is perhaps best. understood when considered in 0 relation to corner structure with which it may be used.

I therefore describe an individual memher in relation to a supporting vertical corner member 6, shown at an angle having its n relatively perpendicular faces 7 and 8 in planes that are spaced inwardly from the outwardly furred wall boards 9 and 10.

I fold the sheet longitudinally upon itself at 11, to form the corner bead, and considering the bend of the fold vertically and diagonally in its final wall position, I extend the two portions of the sheet at 12 and 13 together diagonally inwardly toward the corner of the member 6, diagonally across the spaces to be occupied by the final finishing coats of plaster 14 and 15.

At 17 and 18, which corresponds approximately to vertical intersection lines between the planes of the outside surfaces of the wall boards and the sheet portions 12 and 13, I sharply diverge the sheets into the said planes of the outside surfaces of the wall boards and extend them in these planes to near the outer corners of the wall board ends, then sharply bend them inwardly across the wall board ends so that thersheets again come together at 19 at about the intersection of the planes of the inside surfaces of the wall boards.

From the point or rather line 19 the sheet portions extend together diagonally inwardly to the corner of the member 6 and then diverge to fit against the outside faces 7 and 8 of the corner structure.

I provide outer and inner projecting portions 20 and 21 respectively that overlap the outsides and insides of the wall board ends.

The overlapping projections 20 and 21 are preferably flaps adapted to bend respectively to positions along the outside and inside wall board surfaces.

Obviously each of the overlapping flaps that cooperate to seat the wall board end may be cut from either one of two plane portions of the composite member.

Thus the flap 20 upon the outside of the wall board may comprise metal initially in the portion 22of the composite member between the wall board end and the corner head or as shown in the figure may comprise a flap out from the portion 23 that extends across the wall board end.

In either event the flap is adapted to bend along the outer corner of the wall board end.

In the same way the flap 21 at the inside cornerof the wall board end may be cut and pressed from metal on either side of the inside wall board corner, that is, either from the portion 23 that extends across the wall board end or from the portion 2 L that serves to fur out the wall board from the corner of the member 6.

In the illustration I have out both flaps from the portions 23 that extend across the wall board ends but optionally may out these flaps from the portions 22 and 24; respectively.

The flaps 20 that engage the outside of the wall board are shown staggered with respect to the flaps 21 that engage the inside surface of the wall board.

Usually there is no need to additionally roughen the surface of the portions 22 between the wall board ends and the corner bead.

When the character of plaster and the thickness of the outside coats 14 and 15 is such as to make it desirable to have a stronger hold between the outside coats of plaster 14 and 15 and the portions 22 of my structural member I either cut the flaps 20 from this portion of the member or suitably roughen or perforate the sheet portions to give the desired stronger hold to the plaster.

The furring strip portion 24: between the corner wall board ends and the corner structure 6 comprises the two sheet thicknesses flat together, preferably riveted as at 24: or otherwise fastened as by spot welding.

The flat portions 25 and 26 that fit against the outside surfaces 7 and 8 of the corner structure 6 should be adapted to fasten to any one of the more usual corner structures, either by being bent around corners as shown at 27 in Figure 1 or by nailing, or by both nailing and bending as shown in Figure 2.

The flat portions are preferably cut away at intervals at 28 outwardly from the edge of the furring portion 24 across the corner faces 7 and 8 leaving projecting strips 29 which are adapted to easy bending.

Preferably the strips and cut-away portions of one sheet portion are staggered with respect to the strips and cut-away portions of the other sheet so that the strips 29 on one thickness register with the cut-away portions 28 of the other thickness.

I then bend the strips 29 across one another at the corner of the member 6 which ties the thicknesses together preventing any possibility of the member opening at the corner between the two thicknesses of the sheet.

In Figure 1 the corner structure to which my composite structure fastens is an angle member and I bend the ends 30 around the vertical edges of the angles thus firmly fastening the member in place without the aid of nails or wire.

While obviously I may use wire to hold my members to place against the corner 6 I prefer the method of fastening shown in the figures.

In Figure 2 the corner structure to which my composite member fastens has an extension beyond the width of the fiat portions 7 and 8, as will be the case with concrete, brickwork or similar walls or usually the case even when the corner comprises a wooden stud.

As illustrated in Figure 2, I may cover the strip members 25 and 26 with asuitable member 31 preferably light strap iron or heavy metal ribbon and fasten it to place upon the corner structure in any suitable way as by nails 32 preferably bending up the.

ends of strips as shown at 33.

Obviously the dimensions of the furring strip portions, of the portions across the wall board ends and of the bead are all variant according to circumstances, although in practice standardization of corner and wall structures will probably greatly limit any material variation in these dimensions.

I have shown the flaps that fit against and fasten to the corner structure 6 of sufficient length to bend around the structural members that are usually used in the corner structure, but this length and as to whether or not the portions shall be made as a succession of strips for easy bending is optional. 7,

In view of my invention and disclosure variations and modifications to meet individual need and whim will doubtless become evident to others skilled in the art and I claim all such in so far as they may bereasonably covered by the spirit and scope of my invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. A structural outside corner member including a corner bead, an outside corner furring strip and means for fastening the furring strip to an inner corner structure.

5 2. A structural outside corner member comprising a corner bead, an outside corner furring strip and means for fastening the furring strip to an inner corner structure, said furring strip including clip seats for the Wall board ends.

3. A structural outside corner member comprising a corner bead, an outside corner furring strip for wall boards, and flap extensions from the furring strip for fastening the strip to an inner corner structure.

4. A one piece structural outside corner member comprising a corner bead, and an outside furring strip for wall board ends, the said furring strip including seats to receive the Wall board ends and a portion adapted to engage and fasten to an inner corner structure so as to present the bead along the outside corner of a finished Wall.

BENJAMIN E. CROWELL.

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